Step Time

Hello.NxOgre is fine.But i have a question(very inportant for me:i am trying to develop a multiplayer game):how is updated the time for physic?Does It depend of Ogre or not?
I hope you understood me with my poor english.

NxOgre depends on Ogre for injecting the time, you can override it though.


World* mWorld = World(mRoot, SIMTYPE_CUSTOM);

...

mWorld->simulate(time to inject);
mWorld->render(same time to inject);


I wouldn't use NxOgre for the server though; using PhysX directly in a console type application with a networking library would be perfect.

Ok thank.But how do i do i one of the player have a slow PC (for exemple he have 20 FPS and the other have 40 FPS)?The simulation will be all wrong for him...

Perhaps, but if the PhysX simulation is on the server and is handed out equally to each client every x times a second, then it's more fair.

It's something you should plan out before jumping into though.

It's something you should plan out before jumping into though:that's what i am doing!

but if the PhysX simulation is on the server and is handed out equally to each client every x times a second, then it's more fair:The client who run at 20 FPS need to be re-sincronized each second.And if the client doesn't have a good enought badwitch?

That's unfortunately the thing with networked games; "Lag" is unavoidable and something people will have to put up with.

But simulating the simulation completely on the server is the most fairest and secure way of handling the multi-player world.

This is a very good article to read before starting to plan and code:
http://www.valve-erc.com/srcsdk/general ... rking.html

The following image, taken from the article, pretty much sums it up:

It all relies on the idea that the server is a fraction of time ahead of everyone.

thank a lot!It is very interesting!